Your post is run through with faulty assumptions. You're assuming public transit would remain in its current under funded and under performing state in a world

Your post is run through with faulty assumptions. You're assuming public transit would remain in its current under funded and under performing state in a world where we ban cars and can, thus, stop paying to maintain car infrastructure. In a world where everyone relies on public transit, there's that much more incentive to ensure it remains high functioning.